DTC B3132 All Door Unlock Output Circuit Short to Ground. Chevrolet PJJ 2000

For 1990-2009 cars
Keyless Entry Components
Keyless Entry Schematics
Keyless Entry Schematics
Ground Distribution Schematics
Keyless Entry Schematics

### Circuit Description

The remote keyless entry keyfob sends a radio signal to the Omron module to unlock all of the doors when the keyfob button is pressed. When the BCM receives the unlock all doors signal from the Omron module, the BCM applies battery voltage to the door unlock relay control circuit (194). Ground for the door unlock relay is supplied by circuit 250.

### Conditions for Running the DTC

The remote keyless entry keyfob button is pressed to unlock all of the doors.

### Conditions for Setting the DTC

• | The BCM receives the unlock all doors signal from the keyfob.

• | Circuit 194 is shorted to ground for 250 milliseconds.

### Action Taken When the DTC Sets

The BCM disables the door unlock relay control for the remainder of the ignition cycle.

### Conditions for Clearing the DTC

• | A current DTC B3132 will clear when the malfunction is no longer present and the ignition switch is cycled.

• | All BCM history codes clear after 100 ignition cycles with no current codes active during the 100 ignition cycles.

### Diagnostic Aids

• | If circuit 194 is open, the keyfob will be unable to unlock all doors, but the door mounted switch will operate properly.

• | Pressing the door unlock switch while circuit 194 is shorted to ground is a direct short to battery and will blow the PWR ACC fuse.

### Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

1. Listen for an audible click when the door unlock relay operates. Command both the ON and OFF states. Repeat the commands as necessary.

2. Verifies that the BCM is providing voltage to the door unlock relay.

3. Tests for an open in the ground circuit to the door unlock relay.

4. Tests if voltage is constantly being applied to the door unlock relay.

Step | Action | Yes | No
--- | --- | --- | ---
1 | Did you perform the Door Systems Diagnostic System Check? | Go to Step 2 | Go to A Diagnostic System Check - Door Systems

2

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, command the door unlock relay ON and OFF.

Does the door unlock relay turn ON and OFF with each command?

Go to Diagnostic Aids

Go to Step 3

3

1. Turn OFF the ignition.
2. Disconnect the door unlock relay.
3. Turn ON the ignition, with the engine OFF.
4. Probe the control circuit of the door unlock relay with a test lamp connected to a good ground.
5. With a scan tool, command the door unlock relay ON and OFF.

Does the test lamp turn ON and OFF with each command?

Go to Step 4

Go to Step 5

4

1. Connect a test lamp between the control circuit of the door unlock relay and the ground circuit of the door unlock relay.
2. With a scan tool, command the door unlock relay ON and OFF.

Does the test lamp turn ON and OFF with each command?

Go to Step 8

Go to Step 10

5 | Does the test lamp remain illuminated with each command? | Go to Step 7 | Go to Step 6
6 | Test the control circuit of the door unlock relay for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 9
7 | Test the control circuit of the door unlock relay for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 9
8 | Inspect for poor connections at the door unlock relay. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 11
9 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 12
10 | Repair the ground circuit of the door unlock relay. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 13 | --
11 | Replace the door unlock relay. Did you complete the replacement? | Go to Step 13 | --
12 | Important: Perform the set up procedure for the BCM. Refer to BCM Programming/RPO Configuration in Body Control System. Replace the BCM. Refer to BCM Replacement in Body Control System. Did you complete the replacement? | Go to Step 13 | --

13

1. Use the scan tool in order to clear the DTCs.
2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK